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    Transfer film formation mechanism and tribochemistry evolution of a low-wear polyimide/mesoporous silica nanocomposite in dry sliding against bearing steel

    258932.pdf (3.987Mb)
    Access Status
    Open access
    Authors
    Ma, J.
    Qi, X.
    Dong, Yu
    Zhao, Y.
    Zhang, Q.
    Fan, B.
    Yang, Y.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Ma, J. and Qi, X. and Dong, Y. and Zhao, Y. and Zhang, Q. and Fan, B. and Yang, Y. 2018. Transfer film formation mechanism and tribochemistry evolution of a low-wear polyimide/mesoporous silica nanocomposite in dry sliding against bearing steel. Tribology International. 120: pp. 233-242.
    Source Title
    Tribology International
    DOI
    10.1016/j.triboint.2017.12.026
    ISSN
    0301-679X
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/59857
    Collection
    • Curtin Research Publications
    Abstract

    The addition of a kind of mesoporous silica (MPS) can significantly reduce the wear rate of a thermoplastic polyimide (PI) by more than 90%, which is ascribed to the quick formation of high-quality transfer films induced by unique tribochemical reactions [1]. In-situ observation illustrated the morphology evolution of the transfer films. Further X-ray photoelectron spectroscopy on these transfer films revealed the variation of tribochemical reactions intensity while significant tribochemically induced polymer decomposition and reactions was detected by infrared spectroscopy. Intact and robust transfer films were formed by initial tribochemical adhesion of wear debris and its subsequent accumulation and expansion on the steel surface, which was ascribed to the combined effects of tribochemistry and reduced size and varied morphology of the wear debris.

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